Biggest Airgun Ever......shoot's baseballs with air pressure? Supersonic?

Thanks Fuss, I remember putting a jumbo marshmallow in a vacuum in high school, it expanded to the size of a cantaloupe, awesome! This was the coolest video I’ve watched in a long time. I was a science major in college and just love this kind of stuff. I had a pretty good idea of what was going to happen but was kind of blown away actually watching it, the baseball just seemed to melt into the steel barrier. I could watch that kind of video all day long. So cool!!! Thanks bud.

Stoti